From: Samuel Iglesias Gonsalvez <sigles...@igalia.com>
This is how backends provide the buffer size required to compute
the size of unsized arrays in the previous patch
Signed-off-by: Samuel Iglesias Gonsalvez <sigles...@igalia.com>
---
src/glsl/nir/glsl_to_nir.cpp | 10 ++++++++++
src/glsl/nir/nir_intrinsics.h | 7 +++++++
2 files changed, 17 insertions(+)
diff --git a/src/glsl/nir/glsl_to_nir.cpp b/src/glsl/nir/glsl_to_nir.cpp
index ad7d7dd..0666250 100644
--- a/src/glsl/nir/glsl_to_nir.cpp
+++ b/src/glsl/nir/glsl_to_nir.cpp
@@ -1315,6 +1315,16 @@ nir_visitor::visit(ir_expression *ir)
unreachable("not reached");
}
break;
+ case ir_unop_get_buffer_size: {
+ nir_intrinsic_instr *load = nir_intrinsic_instr_create(
+ this->shader,
+ nir_intrinsic_get_buffer_size);
+ load->num_components = ir->type->vector_elements;
+ load->src[0] = evaluate_rvalue(ir->operands[0]);
+ add_instr(&load->instr, ir->type->vector_elements);
+ return;
+ }
+
case ir_binop_add:
case ir_binop_sub:
case ir_binop_mul:
diff --git a/src/glsl/nir/nir_intrinsics.h b/src/glsl/nir/nir_intrinsics.h
index ed309b6..88f57f4 100644
--- a/src/glsl/nir/nir_intrinsics.h
+++ b/src/glsl/nir/nir_intrinsics.h
@@ -62,6 +62,13 @@ INTRINSIC(interp_var_at_offset, 1, ARR(2), true, 0, 1, 0,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/*
+ * Ask the driver for the size of a given buffer. It takes the buffer index
+ * as source.
+ */
+INTRINSIC(get_buffer_size, 1, ARR(1), true, 1, 0, 0,
+ NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+/*
* a barrier is an intrinsic with no inputs/outputs but which can't be moved
* around/optimized in general
*/
--
1.9.1
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